A solid feeding device for a reaction vessel

Abstract

This utility model relates to a solid feeding device for a reactor, including a reactor body, an inlet at the top of the reactor body, a feeding tank connected to the inlet, a guide port at the top of the feeding tank, and an auxiliary conveying component inside the feeding tank. The top of the auxiliary conveying component extends upward to the outside of the feeding tank and is connected to a gas supply pipe, the other end of which is connected to a gas storage tank. This application combines a gas supply structure with a stirring structure, which not only agitates the material but also effectively utilizes heated nitrogen to quickly dry the material, preventing adhesion and agglomeration due to moisture, thus improving the flowability of the material. Furthermore, nitrogen can force the material to be transported along the Venturi tube at the bottom of the feeding tank into the reactor body. Operators can adjust the gas pressure as needed to provide stable power and a suitable environment for gas-solid transport, effectively ensuring the long-term stable operation of the device.

Description

Technical Field

[0001] This utility model relates to the field of conveying equipment technology, specifically to a solid feeding device for a reaction vessel. Background Technology

[0002] In many industrial production fields such as chemical, pharmaceutical, and food processing, reaction vessels serve as core equipment, undertaking key technological steps such as material mixing and reaction. The feeding process of solid materials is the starting point of the entire production process, and its feeding efficiency, uniformity, and stability directly affect the progress of the reaction within the reaction vessel and the quality of the final product.

[0003] Currently, most common solid feeding devices for reactors employ inert gas-assisted conveying. This involves injecting nitrogen to create high pressure within the conveying pipeline, allowing the nitrogen to simultaneously carry the material into the reactor. However, this traditional method has several drawbacks. Firstly, during feeding, solid materials are prone to agglomeration and blockage, leading to poor material transport, reduced feeding efficiency, and potentially even production interruptions. Secondly, highly viscous or moisture-absorbing materials can adhere to the inner wall of the feeding tank, resulting in waste and potential deterioration, impacting product quality. Furthermore, existing feeding devices lack real-time monitoring and effective control of key parameters such as temperature, pressure, and oxygen content during the feeding process, making it difficult to meet the demands of some production processes with stringent reaction environment requirements, posing significant safety hazards and quality risks.

[0004] Therefore, there is an urgent need for a new type of solid feeding device for reactors that can achieve efficient and stable conveying of solid materials, while also having precise monitoring and control functions for the feeding process, so as to meet the high standards of modern industrial production. Utility Model Content

[0005] Based on the above description, this utility model provides a solid feeding device for a reactor to solve the shortcomings of existing reactor feeding equipment, which are prone to blockage due to material agglomeration and moisture absorption during actual use, thus affecting product production efficiency and quality.

[0006] This utility model is achieved through the following technical solution: A solid feeding device for a reactor includes a reactor body, a feed inlet at the top of the reactor body, a feeding tank connected to the feed inlet, a guide port at the top of the feeding tank, and an auxiliary conveying assembly inside the feeding tank. The top of the auxiliary conveying assembly extends upward to the outside of the feeding tank and is connected to a gas supply pipe, and the other end of the gas supply pipe is connected to a gas storage tank.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the auxiliary conveying assembly includes a drive motor fixedly installed on the top of the feeding tank, a stirring shaft rotatably installed inside the feeding tank, the top end of the stirring shaft engaging with the drive motor, a spiral blade on the stirring shaft, and the spiral blade and the stirring shaft being hollow and interconnected, and a number of spray holes on the outer wall of the spiral blade.

[0009] Furthermore, a ball bearing is provided at the center of the top end face of the stirring shaft, the end of the gas supply pipe is inserted into the inner ring of the ball bearing, and both sides of the ball bearing are sealed by sealing gaskets.

[0010] Furthermore, the gas pipeline is also equipped with an air pump and an electric heater.

[0011] Furthermore, the feed inlet is also equipped with a solenoid valve.

[0012] Furthermore, the bottom of the feeding tank is also provided with a Venturi tube, the bottom of which is sealed to the feed port of the reactor via a flange, and a first exhaust pipe is also provided on the diffuser end sidewall of the Venturi tube.

[0013] Furthermore, the top of the feeding tank is provided with a second exhaust pipe, and the outward ends of both the first exhaust pipe and the second exhaust pipe are connected to the same filter device.

[0014] Furthermore, the inside of the feeding tank is also equipped with a sensor assembly, which includes a pressure sensor, a temperature sensor, and an online oxygen content monitor. A display is also provided on the outer wall of the feeding tank and is electrically connected to the sensor assembly.

[0015] Furthermore, the side wall of the feeding tank is provided with a cavity, and the cavity is filled with a heat insulation layer, which is heat insulation cotton.

[0016] Furthermore, the inner wall of the feeding tank is also provided with an anti-adhesion coating.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: This application improves upon existing reactor feeding equipment by combining a gas conveying structure with a stirring structure. This not only effectively utilizes the spiral blades to agitate the material and prevent blockage, but also effectively utilizes heated nitrogen gas to directly contact the material, thereby using this heat to quickly dry the material and prevent adhesion and agglomeration caused by moisture. This further improves the flowability of the material. Furthermore, the equipment can increase the internal pressure of the feeding tank by injecting nitrogen gas, thereby forcing the material to be conveyed through the Venturi tube at the bottom of the feeding tank into the reactor body. Operators can adjust the gas pressure as needed, providing stable power and a suitable environment for gas-solid transport, effectively ensuring the long-term stable operation of the device. Attached Figure Description

[0018] Fig. 1 This is a schematic diagram of the structure of the reactor body and the feeding tank in this embodiment; Fig. 2 This is a schematic diagram of the transmission structure of the drive motor and the stirring shaft in this embodiment; Fig. 3 This is a schematic diagram of the internal structure of the feeding tank in this embodiment; Labels: 1. Reactor body; 2. Feed tank; 21. Feed inlet; 22. Second exhaust pipe; 3. Auxiliary conveying assembly; 31. Drive motor; 32. Stirring shaft; 33. Spiral blade; 34. Gas supply pipe; 35. First exhaust pipe; 4. Venturi tube. Detailed Implementation

[0019] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0021] Combination Figs. 1-3 As shown, a solid feeding device for a reaction vessel includes: The main body of the reactor 1 is a metal container for the production of chemical products. It has a feed inlet at the top and a discharge outlet at the bottom. It is also equipped with an exhaust pipe on one side of the top and an observation window on the side wall. Feeding tank 2 is located on one side of the top of the reactor body 1, and its bottom is connected to the feed inlet. The feeding tank 2 is also a metal container, and a feed port 21 is opened on the top. The feed port 21 is used to transport materials through an external pipeline. Its inner wall has a cavity, and the cavity is filled with heat insulation cotton. The auxiliary conveying component 3 is installed inside the feeding tank 2 to clear and heat and dry the solid material inside the feeding tank 2, while using gas pressure to force the material downward to be conveyed into the reactor body 1.

[0022] Specifically, in this embodiment, since the reactor needs to operate in a sealed state, a valve should be provided between the feeding tank 2 and the reactor body 1 to ensure that the channel is cut off after a certain amount of material is delivered, so that the material can undergo a high-pressure reaction.

[0023] In addition, during the feeding process, when the material is initially conveyed into the feeding tank 2, the external pipeline will be connected to the feeding tank 2. At this time, some oxygen will be mixed in. In order to facilitate the subsequent discharge of this oxygen using inert gas, a solenoid valve should be installed on the feed port 21 of the feeding tank 2 to close it after the material is conveyed, so as to prevent external oxygen from continuously entering the reactor.

[0024] The auxiliary conveying component 3 is divided into two parts: a stirring structure and a gas conveying structure. The two parts are combined to form a whole, which allows nitrogen gas to be introduced into the feeding tank 2 at the same time during the stirring process, so as to dry the material and assist in conveying it using inert gas.

[0025] The stirring structure includes a drive motor 31, a stirring shaft 32, and a spiral blade 33. The drive motor 31 is bolted to the top of the feeding tank 2 and is arranged horizontally. A first helical gear is provided on its output end. The stirring shaft 32 is vertically set at the center of the feeding tank 2 through a bearing structure, and its top end extends to the top of the feeding tank 2. A second helical gear is fixedly installed on the side wall of its extended outer part. The first and second helical gears mesh with each other, thereby realizing the transmission meshing between the drive motor 31 and the stirring shaft 32. The spiral blade 33 is directly arranged on the stirring shaft 32. Through the above transmission structure, the spiral blade 33 continuously disturbs the material to prevent the agglomerated material from clogging at the bottom. The gas delivery structure includes: a gas delivery pipe 34, a gas storage tank, an electric heater, and a gas pump. The interiors of the stirring shaft 32 and the spiral blades 33 are hollow, and several nozzles are provided on the surface of the spiral blades 33. An opening is provided on the top end face of the stirring shaft 32, communicating with its interior. A ball bearing is fixedly installed on the inner wall of this opening. One end of the gas delivery pipe 34 is directly inserted into the inner ring of the roller bearing, and a sealing gasket is used to seal the connection. The other end of the gas delivery pipe 34 extends outward and communicates with the gas storage tank, which stores high-purity nitrogen or other inert gases. A gas pump and an electric heater are also installed on the gas delivery pipe 34. The gas pump is preferably an STT40 air-driven gas booster pump to enhance the nitrogen delivery efficiency, allowing nitrogen to quickly fill the feeding tank 2, thereby expelling the oxygen mixed inside the feeding tank 2. The electric heater is preferably a JHR-GD-Jinghe Rui. 1228 is mainly used to heat inert gases. The specific heating temperature is adjusted according to actual needs. For example, for heat-sensitive materials, the temperature needs to be controlled below 80℃.

[0026] In addition, a Venturi tube 4 is installed at the bottom of the feeding tank 2. The throat of the Venturi tube 4 should be equipped with an instrument for measuring the material conveying volume, such as a differential pressure transmitter. The differential pressure transmitter and the Venturi tube 4 are combined to form a Venturi flow meter. The flow rate is calculated by Bernoulli's equation (the differential pressure is proportional to the square of the flow rate) using the differential pressure generated by the contraction section and the diffusion section of the Venturi tube 4.

[0027] The nitrogen gas used to assist in the transport of materials in the Venturi tube 4 can first use its heat to quickly evaporate the moisture in the material in conjunction with the stirring structure, so that it is in a dry state, thereby preventing it from becoming damp and clumping. The material in a dry state has higher flowability, thus preventing the material from clogging at the throat of the Venturi tube 4, so that the staff can accurately control the input.

[0028] In actual use, if the conveying efficiency is to be accelerated, the pressure of nitrogen must be increased, that is, the conveying efficiency must be improved. After this part of nitrogen is conveyed into the feeding tank 2, not only is it necessary to discharge the nitrogen that is used for auxiliary conveying, but also to take into account the water vapor after the water vapor is generated. Therefore, a first exhaust pipe 35 is provided on the diffuser end side wall of the Venturi tube 4, and a second exhaust pipe 22 is provided on the top of the feeding tank 2. The sum of the conveying volume of the first exhaust pipe 35 and the second exhaust pipe 22 should be equal to the conveying volume in the gas delivery pipe 34.

[0029] Therefore, when nitrogen at high temperature is delivered into the equipment, the generated water vapor and some nitrogen will be quickly discharged into the feeding tank 2 through the second exhaust pipe 22, thereby avoiding continuous contact between water vapor and materials and improving the drying efficiency of materials. In addition, some nitrogen is located above the materials, which increases the pressure inside the feeding tank 2, and thus, along with the downward conveying of materials, it is finally discharged through the first exhaust pipe 35 at the diffuser end of the venturi tube 4. This effectively combines stirring, gas conveying and high-temperature drying, which can ensure precise control of materials and avoid blockage. Moreover, the nitrogen is recovered through an external filtration device and can be recycled. In this process, nitrogen can also be used to fill the feeding tank 2 so as to discharge the oxygen inside the feeding tank 2 and improve production quality.

[0030] The process flow of the above filtration device is as follows: wet nitrogen → multi-media filter → precision filter → freeze dryer → adsorption dryer → PSA purification device → catalytic deoxygenator → high-efficiency filter → high-purity nitrogen (99.999%).

[0031] To facilitate adjustments by staff based on factors such as air pressure and temperature, a sensor assembly should also be installed inside the feeding tank 2. This sensor assembly includes an air pressure sensor (Bosch BMP280), a temperature sensor (Pt100 platinum resistance thermometer), and an online oxygen content monitor (Qingdao Junyuan HT-LA416). Furthermore, a display is installed on the outer wall of the feeding tank 2 and electrically connected to the sensor assembly to display the internal air pressure, temperature, and oxygen content.

[0032] When using materials with high moisture content, short-term drying is insufficient to meet usage requirements due to the high moisture content, and the wet material will affect normal conveying. Therefore, the following steps are required: ① After the wet material is conveyed into the feeding tank 2, the channel between the feeding tank 2 and the venturi tube 4 is cut off by the valve, and then the auxiliary conveying component 3 is turned on; ② Adjust the nitrogen pressure to ensure that the amount of nitrogen delivered in the second exhaust pipe 22 is the same as that delivered in the gas delivery pipe 34, so that it is under normal pressure. Use high temperature nitrogen to stir and dry the material inside the feeding tank 2. The nitrogen mixed with water vapor and oxygen are discharged through the second exhaust pipe 22 at the top and then purified and recovered by the filtration device. ③ After drying for a period of time, open the channel between the feeding tank 2 and the venturi tube 4, cut off the second exhaust pipe 22 at the top, and at the same time increase the nitrogen pressure so that the conveying capacity inside the gas delivery pipe 34 is greater than the conveying capacity of the second exhaust pipe 22. At this time, the dried material will be conveyed downward to the inside of the venturi tube 4 along with some nitrogen. After the quantitative conveying at the throat of the venturi tube 4, the material is discharged into the reactor at a fixed conveying efficiency. The nitrogen and oxygen mixed inside the venturi tube 4 are discharged through the first exhaust pipe 35. ④ If the reactor needs to be vented, the second exhaust pipe 22 can be directly cut off, so that nitrogen gas is transported into the reactor along with the material, and then discharged through the exhaust pipe on the reactor. Through long-term transport, the entire reactor can be filled with nitrogen gas.

[0033] When using materials with a low moisture content, since the moisture content is high, a short drying time is sufficient to meet the usage requirements. Therefore, the following steps are required. ① First, open the auxiliary conveying component 3, fill the entire feeding tank 2 with nitrogen, and simultaneously preheat the entire tank with the heat of the nitrogen; ② The material is directly conveyed into the feeding tank 2, and the stirring structure is activated at the same time to make the material be stirred quickly, expanding the contact range with nitrogen. Some moisture and nitrogen are discharged through the second exhaust pipe 22 at the top, and some nitrogen is discharged through the first exhaust pipe 35 at the bottom. At this time, the sum of the output efficiency of the second exhaust pipe 22 and the first exhaust pipe 35 is equal to the conveying efficiency of the gas conveying pipe 34.

[0034] Powdered materials are also prone to adhesion, so an anti-adhesion coating, such as a Teflon coating, should be applied to the side wall of the feeding tank 2, as well as the stirring shaft 32, the spiral blades 33, and the inner wall of the venturi tube 4.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this utility model.

Claims

1. A solid feeding device for a reaction vessel, characterized in that, The reactor includes a reactor body (1), with a feed inlet at the top of the reactor body (1). A feed tank (2) is connected to the feed inlet. A guide port (21) is provided at the top of the feed tank (2). An auxiliary conveying assembly (3) is provided inside the feed tank (2). The top of the auxiliary conveying assembly (3) extends upward to the outside of the feed tank (2) and is connected to a gas supply pipe (34). The other end of the gas supply pipe (34) is connected to a gas storage tank. The auxiliary conveying assembly (3) includes a drive motor (31) fixedly installed at the top of the feed tank (2). A stirring shaft (32) is rotatably installed inside the feed tank (2). The top end of the stirring shaft (32) is engaged with the drive motor (31). (32) is provided with a spiral blade (33), and the spiral blade (33) and the stirring shaft (32) are hollow and interconnected. The outer wall of the spiral blade (33) is also provided with several spray holes. The center of the top end face of the stirring shaft (32) is also provided with a ball bearing. The end of the gas pipe (34) is inserted into the inner ring of the ball bearing. Both sides of the ball bearing are sealed by a gasket. The gas pipe (34) is also provided with a gas pump and an electric heater. The inside of the feeding tank (2) is also provided with a sensor assembly. The sensor assembly includes a pressure sensor, a temperature sensor and an online oxygen content monitor. The outer wall of the feeding tank (2) is also provided with a display and electrically connected to the sensor assembly.

2. The solid feeding device for the reactor according to claim 1, characterized in that, The feed inlet (21) is also equipped with a solenoid valve.

3. The solid feeding device for the reactor according to claim 2, characterized in that, The bottom of the feeding tank (2) is also provided with a Venturi tube (4), the bottom of the Venturi tube (4) is sealed to the feed port of the reactor through a flange, and a first exhaust pipe (35) is also provided on the diffuser end sidewall of the Venturi tube (4).

4. The solid feeding device for the reactor according to claim 3, characterized in that, The top of the feeding tank (2) is provided with a second exhaust pipe (22), and the outward ends of the first exhaust pipe (35) and the second exhaust pipe (22) are both connected to the same filter device.

5. The solid feeding device for the reactor according to claim 1, characterized in that, The side wall of the feeding tank (2) is provided with a cavity, and the cavity is filled with a heat insulation layer, which is heat insulation cotton.

6. The solid feeding device for the reactor according to claim 1, characterized in that, The inner wall of the feeding tank (2) is also provided with an anti-adhesion coating.

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